**Concept:** The question tests on the basics of Probablity

**Solution:**

Probability of selecting a red balloon = 1/6

Probability of not selecting a red balloon = 1 - 1/6 = 5/6

Probability of getting at least 1 red balloon = 1 - Probability of not getting a red balloon

If 3 balloons are selected, then the probability of not getting a red balloon = 5/6 * 5/6 * 5/6 = 125 / 216

Therefore probability of at least 1 red balloon = 1 - 125/216 = 91/216

Option A